There's something lacking in the analysis here. Someone did run 14:11, but it was not Ayana. It was Tirunesh Dibaba in 2008, the same year she ran 29:54 winning the gold in Beijing, age 23. Somehow though, Ayana, with a similar PR, ran 37 seconds faster for the longer distance than Dibaba was able to! Apparently though, Dibaba was dogging it back in 2008 as at age 31 she just broke her PR by 12 seconds.
Just looking at the numbers, it would seem these performances were super-enabled. It might be the track, it might be doping, but the numbers invite scrutiny.
The olympic final in 2008 started much slower than 2016. Dibaba's first 5k was about 1 minute slower than her pr. I would be almost impossible to set a WR starting out that slowly (for her). Also Dibaba didn't need to push the pace because she had a far better kick.
I'd be interested in hearing about 10,000m for women that have been paced at WR pace for the first 5k. It seems like it almost never happens until yesterday.